Pipe-joint.



J. R. TANNER 5: D. B. BANKS.

PIPE JOINT.

APPLICATION FILED MAY 11. 1909.

Patanted Segfiz. 6 $18.

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JULIUS R. TANNER, OF PITTSBURG, PENNSYLVANIA, AND DANIEL B. BANKS, OF

BALTIMORE, MABYLAND..

PIPE-JOINT,

Specification of Letters Patent.

Application filed May 11, 1909.

accuse.

' rammed Sept. 6, 1910. Serial no; 495,309.

To aZZ whom it may concern:

Be it known that we, JULIUS R. TANNER and DANIEL B. BANKS, citizens of the United States, .residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, and city of Baltimore, State of Maryland, respectively, have invented or discovered new and useful Improvements in Pipe-Joints, of which the following is a specification.

Our invention relates to pipe joints and its object is to provide flexible pipe joints for high-pressure water mains.

It has been our aim to produce a joint of this character that will permit the pipe to be arranged at a convenient angle to; each other without the possibility of drawing the pipe-ends at the joint and of allowing the pipe-e nds to be forced out of the clamping devices therefor.

Referring to the accompanying drawing, the figure is a central longitudinal section througl'i two pipes connected by our improved pipe-joint.

' Referring to the drawing, 1 and 2 represent two pipes having their adjacent ends secured together by our improved joint.

3 is a ring, or annular support, having its internal diameter preferably equal 'to the internal diameter of the pipes 1 and 2. The periphery of the ring 3? is composed of two spherical zones, shown as taken from the opposite halves of the same sphere, a. central zone being omitted and the lateral zones be ing brought together at their greatest circles, which are obviously smaller than the greatest zone of the sphere or spheres from which they were taken. The right hand zone is described by the radius 1O drawn from the center l, preferably at the left-hand end of the ring 2- and the left-hand zone is described by the radius 1O from the center 4", preferably in the right-hand end of the ring 3*. The centers 4& and 4 lie in a line which includes the axial center of, the ring 3; that is the axis of the ring or its prolongation.

The adjacent ends of the pipes 1 and 2 are flared and their inner surfaces are curved to fit the zones on the ring 3. The flared ends are of uniform thickness so that their outer surfaces will be described by the radii' mum angle for which the joint has been designed. On the flaring ends ofthe pipes we place the two clamping rings? and 8,

having their interior surfaces shaped to fit the outer surfaces of the said pipe-ends, Bolts 9 passed through the rings set-vein an obvious manner to draw the rings toward each other, thereby causing them to wedge and clamp the flaring pipe-ends 5 and 6 tightly between the ring 3 and the clampmg rings.

We have provided clearance spaces 12 by omitting an annular portion, triangular in section, from the outer angle of the rings next to the pipe-ends. These clearance spaces permit the pipes to be flexed until the pipe walls engage the walls of the spaces 12.

It will be observed that the pipe ends assume a greater angle to the pipe bodies than they would if the zones were described from a point midway between the centers 4*, and l". Consequently, these centers may be located at any place which will make the angles of the pipe-ends with the pipe bodies greater than would be produced if the centers were placed so as to makethe zonesa single central zone of a sphere, It is clear that it will take more power to pull the pipe ends out of the clamping rings when zones having their greatest circle less than the great zone of the sphere from which it was taken are used than would be required if the zones included the greatest circle of a sphere. This is true because the greater the flare, which reaches its maximum when it is at right angles to the pipe-body, the more difiicult it becomes to draw it down to or toward the diameter of the pipe-body. The force required to draw out the pipe ends from the clamping rings decreases as the flare of the pipe-ends decreases, reaching a minimum when the flare becomes zero.

By constructing the pi e-joint as described, the pipes may be exed atvarious angles after merely loosening the bolts without any change in the fit of the pipeends on the rings 3. No matter what the angle of the ipes may be we may secure a perfect fit of the parts, without disturbing the parallelism of the clamping rings, and

consequently, without any bending of the bolts when the rings are tightly clamped in place. ,It is clear also that by omitting the central zone of the sphere, or by the use of two small zones of s' eres, We save a eat deal of material in t e manufacture 0 our rings3 and also that thexings 7 and 8 may be hi'ought closer togethenmaking a more compact structure I s 'We elaim I l 1 In a universal pipe-joint, two pipes having their adjacent ends flared and-0f uniform thickness, a ring havin its external surface constituting two sp erical zones Whose largest circlesare smaller than the reetest circle of their spheres, said ring he mg seated Within and fitting the said'fin'ed 1 by the said DANIEL B pipe-ends, a movable clamping ring surrounding the flared end of each pipe, and

eeeeee means for drawing the clamping rings towal'd each other.

8' ed b the said JULIUS R. TANNER at Pitts urg t 's 26th da of April, 1909, and

this 6 dey of May, 1909.

JULIUS R. TANNER. DANIEL B. BANKS. Witnesses for Julius R. Tanner:

F. N. BARBER, I 'ANNA R. BEA'ITY. WVitnesses for Daniel B. Banks:

J. WALLACE BRY N HUGH McCoy.

ANKS, at Baltimore, 20 

